Question

Last year Johnny took 4.5 hours to put holiday lights on his house by himself. The following year, his wife, Amanda helped him. Together, it took them 2.88 hours to put the lights up. How long would Amanda take to put up the lights if she did it by herself?

Answer 1

Amanda would take 1.62 hours to put up the holiday lights by herself.

Step-by-step explanation:

To find out how long Amanda would take to put up the lights by herself, we can start by subtracting the time it took Johnny and Amanda together from the time it took Johnny alone.
Let's say Amanda takes x hours to put up the lights by herself.
So the equation becomes: 4.5 hours - 2.88 hours = x hours.
Simplifying, we find that Amanda would take 1.62 hours to put up the lights by herself.